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Measuring the spin distribution of supermassive black holes is of critical importance for understanding how these black holes and their host galaxies form and evolve over time, yet this type of study is only in its infancy. This brief describes how astronomers measure spin in supermassive black holes using X-ray spectroscopy. It also reviews the constraints that have been placed on the spin distribution in local, bright active galaxies over the past six years, and the cosmological implications of these constraints. Finally, it summarizes the open questions that remain in this exciting new field of research and points toward future discoveries soon to be made by the next generation of space-based observatories. |
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 Professional Windows Embedded Compact 7
Learn to program an array of customized devices andsolutions
As a compact, highly efficient, scalable operating system,Windows Embedded Compact 7 (WEC7) is one of the best options fordeveloping a new generation of network-enabled, media-rich, andservice-oriented devices. This in-depth resource takes you throughthe benefits... | | Agriculture for Improved Nutrition: Seizing the Momentum
About 800 million people suffer from hunger, 2 billion from lack of micronutrients, and more than 2 billion from overweight and obesity. There is renewed interest in reshaping agricultural and food systems, at the global, regional and national levels, so that poor and vulnerable people have access to and are able to consume nutritious ... | | Introducing Ubuntu: Desktop LinuxCompletely free and highly robust, Ubuntu has the power to bring the Linux desktop to the masses. Introducing Ubuntu: Desktop Linux is your key to learning this new, userfriendly, and free alternative to Windows. Think of it as a personal tutorial, a one-on-one class with an expert user of Ubuntu. It begins by helping you choose the right Ubuntu... |
Sams Teach Yourself Tumblr in 10 Minutes
Sams Teach Yourself Tumblr® in 10 Minutes offers straightforward, practical answers when you need fast results. By working through 10-minute lessons, you’ll learn everything you need to use Tumblr to create a blog for sharing tweets, links, text, media, email, anything! Each compact lesson zeroes in on... | | Thinking Fluid Dynamics With Dolphins (Stand Alone)This small volume is the English edition of a Japanese book entitled "Learning fluid dynamics from dolphins". The title is derived from the fact that "Dolphins swim too fast to be explained scientifically". The first person to clearly describe this phenomenon was the English biologist Sir James Gray (J.Gray, 1936), and... | | The ECG in Prehospital Emergency Care
Now that state of the art equipment can be carried in ambulances, prehospital emergency staff are able to perform an ECG soon after arrival on scene, enabling the EMS provider to gather important diagnostic information that can not only guide prehospital therapy but also direct hospital-based treatment.
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